/Engine/Plugins/Runtime/MassGameplay/Source/MassRepresentation/Public/MassRepresentationTypes.h
Adds the specified struct reinterpreted as custom floats to our custom data. Individual members of the specified struct should always fit into a float. When adding any custom data, the custom data must be added for every instance.
template<typename InCustomDataType> void AddBatchedCustomData ( InCustomDataType InCustomData, const float LODSignificance, const float PrevLODSignificance, int32 NumFloatsToPad )